US5427265A - Lunchbox with safety lock - Google Patents

Lunchbox with safety lock Download PDF

Info

Publication number
US5427265A
US5427265A US08/140,385 US14038593A US5427265A US 5427265 A US5427265 A US 5427265A US 14038593 A US14038593 A US 14038593A US 5427265 A US5427265 A US 5427265A
Authority
US
United States
Prior art keywords
handle
latch
lock
hinge
shells
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Fee Related
Application number
US08/140,385
Other languages
English (en)
Inventor
Victor J. J. Cautereels
Ian Ferris
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Dart Industries Inc
Original Assignee
Dart Industries Inc
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Dart Industries Inc filed Critical Dart Industries Inc
Priority to US08/140,385 priority Critical patent/US5427265A/en
Assigned to DART INDUSTRIES INC. reassignment DART INDUSTRIES INC. ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: FERRIS, IAN, CAUTEREELS, VICTOR J.J.
Priority to IL110417A priority patent/IL110417A/en
Priority to ZA945478A priority patent/ZA945478B/xx
Priority to AU68734/94A priority patent/AU6873494A/en
Priority to CA002129914A priority patent/CA2129914A1/en
Priority to DE69421037T priority patent/DE69421037T2/de
Priority to EP94112783A priority patent/EP0649614B1/en
Priority to SI9430277T priority patent/SI0649614T1/xx
Priority to DK94112783T priority patent/DK0649614T3/da
Priority to AT94112783T priority patent/ATE185254T1/de
Priority to ES94112783T priority patent/ES2138640T3/es
Priority to PH48996A priority patent/PH30507A/en
Priority to BR9403980A priority patent/BR9403980A/pt
Priority to JP6254925A priority patent/JP2528629B2/ja
Priority to KR1019940026934A priority patent/KR960014745B1/ko
Publication of US5427265A publication Critical patent/US5427265A/en
Application granted granted Critical
Priority to HK98115846A priority patent/HK1014466A1/xx
Priority to GR990403025T priority patent/GR3031933T3/el
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

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Classifications

    • E—FIXED CONSTRUCTIONS
    • E05—LOCKS; KEYS; WINDOW OR DOOR FITTINGS; SAFES
    • E05C—BOLTS OR FASTENING DEVICES FOR WINGS, SPECIALLY FOR DOORS OR WINDOWS
    • E05C19/00—Other devices specially designed for securing wings, e.g. with suction cups
    • E05C19/06—Other devices specially designed for securing wings, e.g. with suction cups in which the securing part if formed or carried by a spring and moves only by distortion of the spring, e.g. snaps
    • A—HUMAN NECESSITIES
    • A45—HAND OR TRAVELLING ARTICLES
    • A45C—PURSES; LUGGAGE; HAND CARRIED BAGS
    • A45C11/00—Receptacles for purposes not provided for in groups A45C1/00-A45C9/00
    • A45C11/20—Lunch or picnic boxes or the like
    • A—HUMAN NECESSITIES
    • A45—HAND OR TRAVELLING ARTICLES
    • A45C—PURSES; LUGGAGE; HAND CARRIED BAGS
    • A45C13/00—Details; Accessories
    • A45C13/26—Special adaptations of handles
    • A45C13/28—Combinations of handles with other devices
    • E—FIXED CONSTRUCTIONS
    • E05—LOCKS; KEYS; WINDOW OR DOOR FITTINGS; SAFES
    • E05B—LOCKS; ACCESSORIES THEREFOR; HANDCUFFS
    • E05B65/00—Locks or fastenings for special use
    • E05B65/52—Other locks for chests, boxes, trunks, baskets, travelling bags, or the like
    • E05B65/5207—Other locks for chests, boxes, trunks, baskets, travelling bags, or the like characterised by bolt movement
    • E05B65/5246—Other locks for chests, boxes, trunks, baskets, travelling bags, or the like characterised by bolt movement rotating
    • E05B65/5269—Other locks for chests, boxes, trunks, baskets, travelling bags, or the like characterised by bolt movement rotating about an axis parallel to the surface on which the lock is mounted
    • E05B65/5276—Other locks for chests, boxes, trunks, baskets, travelling bags, or the like characterised by bolt movement rotating about an axis parallel to the surface on which the lock is mounted parallel to the wing edge

Definitions

  • the lunchbox must be relatively inexpensive, and at the same time of sturdy construction.
  • the lunchbox should also be easily opened by a young child, while at the same time secure against accidental opening, particularly when subjected to relatively rough handling as might be expected as the children interact in travelling to and from school, on field trips, and the like.
  • the handled carrying box of the present invention finds particular utility as a lunchbox for small children.
  • the lunchbox is constructed of only three separate units, each formed of an appropriate synthetic resin including an inherent degree of flexible resiliency and a capability of forming integral living hinges, e.g., polypropylene.
  • the box basically consists of separate molded base and lid shells, each including integral hinge components which snap lock together to secure the shells by a dual hinge assembly.
  • a third component a separately molded handle, snap locks to mounting brackets integral with the front wall of the base, thus completing the structure of the lunchbox.
  • a significant aspect of the invention is the provision of a lunchbox with a primary latch assembly which secures the lid to the base in a closed position and is so constructed as to automatically latch upon a closing of the lid, and to be easily manipulated, even by a young child, to allow an opening of the lunchbox.
  • a separate locking assembly is also provided.
  • the locking assembly prevents accidental opening of the lunchbox and comprises cooperating components respectively on the handle and the opposed or lid shell.
  • the lock components including dual split locking collars on the handle and cooperating lugs or projections on the lid, are so positioned as to engage and disengage in only a single stored or rest position of the handle against the front wall of the base. This position is basically the position a handle normally assumes when a lunchbox is to be opened.
  • the handle in the conventional carrying position, or for that matter in any other position pivotally adjusted from the stored or rest position, so relates the locking collars to the locking lugs as to preclude disengagement and release of the lid from the base even should the latch assembly be inadvertently manipulated.
  • accidental opening of the lunchbox particularly when being carried in a conventional manner, is not possible.
  • the lock assembly When the lunchbox is to be opened, the lock assembly presents no encumbrance to the opening of the box in that the lock assembly is automatically released upon movement of the handle to its stored position, the position normally assumed when the box is to be opened as a convenient means for holding or stabilizing the base by one hand of the user as the latch assembly is released and the lid pivoted away from the base by the second hand.
  • FIG. 1 is a perspective view of the closed lunchbox
  • FIG. 2 is an exploded perspective view of the two shells of the lunchbox
  • FIG. 3 is a perspective detail of the rear walls of the shells and the hinge assemblies pivotally joining the rear walls, with one assembly partially broken away for purposes of illustration;
  • FIG. 4 is an enlarged cross-sectional detail through a hinge assembly and taken on a plane passing along line 4--4 in FIG. 3;
  • FIG. 5 is an exploded perspective detail illustration one of the two handle-mounting assemblies
  • FIG. 6 is a partial perspective view of the front walls of the two shells with the latch assembly and lock assemblies disengaged;
  • FIG. 7 is an enlarged cross-sectional detail taken substantially on a plane passing along line 7--7 in FIG. 6;
  • FIG. 8 schematically illustrates a pair of lock components, respectively on the front walls of the two shells, aligned for engagement
  • FIG. 9 is a schematic illustration similar to FIG. 8 with the lock components engaged
  • FIG. 10 is a similar schematic illustration with the handle pivoted to a carrying position and the lock components fixed against release;
  • FIG. 11 is a similar schematic illustration with the handle in a second lifting position and the lock components fixed against release;
  • FIG. 12 is a cross-sectional detail through one of the lock assemblies and the corresponding handle mount assembly taken on the plane of line 12--12 in FIG. 10.
  • the carrying box or handled lunchbox 10 consists of a base shell or base 12, a lid shell or lid 14, and a handle 16, each molded of an appropriate synthetic resinous material, and each including cooperative components for a joinder of the three units to define an assembled lunchbox. While not limited thereto, the preferred configuration of the lunchbox, as illustrated, includes opposed linear sides and arcuate or semicircular ends.
  • the base 12 comprises a bottom 18, opposed generally planar front and rear walls 20 and 22, and opposed arcuate end walls 24.
  • the walls 20, 22 and 24 define a continuous peripheral wall assembly about the bottom 18 and are integrally molded therewith.
  • the peripheral wall assembly, remote from the bottom 18, terminates in a continuous upper rim 26.
  • the lid 14 similarly configured to mate with the base 12, includes a top 28 opposed generally planar front and rear walls 30 and 32, and opposed arcuate end walls 34.
  • the walls 30, 32 and 34 are integral with the top 28 and define a peripheral wall assembly continuously about the periphery thereof, terminating in a continuous outer edge or rim 36 which, in the closed position of the lunchbox, seats and seals against the base rim 26. This is illustrated in the sectional detail of FIG. 4 which also illustrates an integral positioning flange 38 immediately outward of and extending beyond the lid rim 36 to engage with the outer surface of the peripheral wall assembly of the base.
  • each hinge assembly 40 includes a hinge panel 42 extending from the base rear wall 22 and comprising an inner portion 44 integral with the wall 22, and an outer portion 46 jointed to the inner portion by an integral living hinge 48.
  • the rearwardly directed face of the outer panel portion 46 includes a recess therein defining a downwardly directed shoulder 50.
  • a mating keeper or retainer 52 is provided for each of the hinge panels, and is integrally formed with the rear wall 32 of the lid and so positioned as to receive the corresponding hinge panel outer portion 46.
  • Each keeper 52 comprises a U-shaped member with the legs thereof integral with the rear wall 32 and the crossbar 54 in outwardly spaced relation to the wall 32.
  • the crossbar 54 is of a length slightly greater than that of the hinge panel outer portion 46 for a sliding introduction of the outer portion 46 into the keeper 52 immediately inward of the crossbar 54.
  • the crossbar 54 is provided with an inwardly projecting integral lug 56 which cooperates with the shoulder 50 on the hinge panel outer portion for a snap-joining of the hinge panel 42 to the keeper 52.
  • a transverse backing plate 58 is provided within each keeper 52, integrally formed with the rear wall 32 and projecting outward to restrict the depth of the keeper sufficient so as to prevent accidental disengagement of the hinge panel from the keeper once the hinge panel is engaged.
  • an appropriate bevel can be provided on the inner face of the keeper lug 56 to facilitate engagement in conjunction with the inherent resilient flexibility of the material of the hinge assembly.
  • each of the base and lid rear walls 22 and 32 is provided with a pair of rearwardly projecting plate-like feet 60 which projects slightly beyond the two hinge assemblies 40 just laterally outward thereof. These feet 60 enable a standing of the lunchbox 10 upright.
  • the legs also function as a convenient means to limit the outward swinging of the lid 14 relative to the base 12, to a position wherein the lid and base are aligned or in a generally common plane to provide convenient dual serving compartments.
  • the lunchbox 10 when closed, is latched by a releasable latch assembly comprising a keeper 62 mounted on the front wall 20 of the base slightly inward of the rim or upper wall edge 26, and a pivoting latch 64 integrally molded with the front wall 30 of the lid 14.
  • the keeper 62 includes an elongate slot 66 therethrough parallelling the front wall 20.
  • the back edge of the slot that is the edge closest to the wall 20, has a forwardly projecting undercut lip 68 centrally therealong.
  • the latch 64 is generally in the nature of a panel of a width slightly less than the length of the slot 66.
  • a hinge bar or plate 70 extends transversely across the latch 64 intermediate the opposed edges thereof, and integrally joins the latch 64 to the lid front wall 30.
  • the latch 64 forward of the hinge bar 70, that is toward the rim edge 36 of the lid 14, defines a catch portion 72 which is selectively received through the keeper slot 66.
  • the catch in turn has a transverse slot 74 therein which includes a lip 76 along the outer edge of the slot 74, that is the edge of the slot closest to the free edge of the catch portion. This lip 76, upon an engagement of the catch portion 72 through the keeper slot 66, snap locks behind and in engagement with the keeper lip 68.
  • That portion of the latch 66 to the opposite side of the hinge bar 70 from the catch 72 defines a pressure pad or area for selected manual release of the catch 72 from the keeper 62 upon a pivoting of the latch 64 through the inherent flexing of the hinge bar 70.
  • the pressure pad portion 78 is of a substantially greater length than the catch portion 72 and is configured to provide a finger gripping surface, both features of which facilitate manipulation of the latch 64, particularly by a young child.
  • the latch 64 in its at rest or unflexed position, is so oriented as to provide for a snap lock of the catch portion 72 with the keeper as the lid is brought to a closed position.
  • inward pressure on the pad portion 78 again through a slight snapping action, disengages the catch lip 76 from the keeper lip 68 and allows for a withdrawal of the latch from the keeper slot 66 in an obvious manner.
  • one or more abutments 80 can be integrally formed with the lid front wall 30 in underlying relation to the pressure pad portion 74 of the latch 68 to limit the inward flexing of the latch 64 to both properly align the catch portion 72 for withdrawal from the keeper slot 66 and to avoid any necessary excess flexing of the latch hinge bar or panel 70.
  • the size and configuration of the pressure panel 78 is such as to actually provide a handle which, in addition to facilitating release of the latch, also allows the user to grasp and outwardly swing the lid 14 relative to the base 12.
  • the handle 16 is of a basic U-shaped configuration with a central hand grip bar or portion 82 and opposed legs 84, each having a transverse mounting opening 86 defined therethrough. Each opening is basically circular, interrupted only by a pair of opposed segment-shaped shoulders 88.
  • a pair of cooperating mounting brackets 90 are integrally formed with and project forwardly from the front wall 20 of the base 12.
  • Each of the brackets 90 includes an integral laterally extending cylindrical stub shaft 92 terminating in an outer slightly domed enlarged head 94 of a diameter only slightly less than that of the corresponding opening 86, each head having a central slot or kerf 96 defined thereacross.
  • the handle 16 will be rotated to position the opposed segments 88 perpendicular to the head kerfs 96, thereby aligning the relatively weaker peripheral portions of each head 94 with the shoulders 88 to facilitate a flexing and snapping past the shoulder portions.
  • the handle 16 is mounted on the stub shafts 92 of the two brackets 90, the handle is free to rotate between opposed positions respectively overlying the base and lid front walls, and to any intermediate position therebetween, for example perpendicular to the front walls in a normal carrying position.
  • the handle 16 in addition to its conventional use as a means for conveniently carrying the lunchbox, has another and particularly significant function. More particularly, the handle 16 controls a lock assembly 98, preferably a pair of duplicate assemblies 98, one associated with each handle leg 84.
  • Each lock assembly 98 includes, as a first component thereof, a keeper in the form of a cylindrical lock collar 100 integral with and projecting laterally outward from the corresponding handle leg in surrounding relation to and coaxial with the opening 86 therein.
  • the lock collar 100 is a split collar, that is provided with an access notch 102 radially therethrough and both opening toward and centrally aligned with the extreme outer end of the handle or handle leg. Noting FIG. 12 in particular, it will be appreciated that the lock collar 100 extends substantially beyond the enlarged head 94 on the stub shaft 92 of the corresponding mounting bracket 90 when engaged through the corresponding handle opening 86 for pivotally mounting the handle.
  • each lock assembly 98 comprises a lock post or bracket 104 integral with and projecting forwardly from the lid front wall 30 to align immediately outward of an associated handle collar 100 upon a closing of the lid over the base.
  • Each of these lock brackets 104 includes an integral locking lug 106 on the lateral inner face thereof.
  • the lug 106 projects laterally inward from the bracket 104 and is elongate in a direction generally parallel to the front wall 30 of the lid 14 and perpendicular to the rim edge thereof.
  • the lug 106 is of a length slightly less than the internal diameter of the associated collar 100.
  • Each lock bracket 104 is so positioned whereby, upon a closing of the lid 14 over the base 12 the lock bracket 104 will lie immediately adjacent the outer edge of the associated collar 100.
  • the lock lug 106 in turn, will be positioned within the collar.
  • FIGS. 6, 8 and 9 in order to engage the lock lug or Lugs 106 within the corresponding collar or collars 100, and thus engage each lock assembly 98, the handle must be aligned to overlie and substantially parallel the base front wall 20. This in turn aligns the collar notches 102 with the corresponding lock lugs 106 for a movement of the lugs 106 into the associated collars 100 as the lid is closed. As will be appreciated, this movement effects a corresponding engagement of the latch assembly, or more particularly the latch 64 within the keeper 62. It will be noted that the lugs 106 are slightly tapered toward a narrower leading end relative to the access notches 102 whereby alignment and proper engagement of the lugs 106 within the associated collars is facilitated.
  • the base when closing the lunchbox, the base will normally be horizontally oriented on a table or the like, and the lid pivotally closed downward thereagainst.
  • the handle 16 will normally be in a stored or release position depending from the mounting brackets immediately forward of and generally parallel to the base front wall 20, thus aligning the collar access notches for reception of the lock lugs 106.
  • the handle After the lid has been closed, the handle, noting FIGS. 10 and 11, will, in the normal manner, be rotated into a carrying or lifting position.
  • the access ports 102 of the collars 100 are rotated away from the initial assembling position.
  • the box When the lunchbox is to be opened, the box may be positioned upright, resting on the supports or feet 60, with the handle 16 in a normal manner swung to its release position overlying the base front wall 20 as in FIG. 6.
  • the latch 64 can then easily be engaged by one hand, slightly depressed and released to outwardly swing the lid.
  • the second hand of the user can lightly grasp the handle 16. This will also ensure that the handle does not swing away from the release position until such time as the lid is released. Minimal manual dexterity is required, notwithstanding the dual latch and lock assemblies and the safety features provided thereby.
  • the assemblies of the invention while structurally unique, are of rather simple and trouble free construction, capable of being engaged and disengaged with equal facility.
  • the handle 16 be so pivoted as to engage against the pressure pad 74 of the latch, either accidentally or intentionally to fold the handle to a stored position, such an engagement will not release the lid in that the lock assembly or assemblies will, in this position, be fully engaged.
  • the invention discloses a unique safety lock assembly which automatically engages and remains engaged in any normal carrying position of the lunchbox, thereby preventing any possibility of an accidental opening of the lunchbox, particularly as the box is being carried.
  • the unique secondary lock assembly which in itself is easily disengaged, eliminates the necessity for the use of a complex latch assembly or multiple latches as could be too challenging for a young child.
  • the invention combines security and simplicity, both of particular significance in a child's lunchbox.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Purses, Travelling Bags, Baskets, Or Suitcases (AREA)
  • Closures For Containers (AREA)
  • Containers Having Bodies Formed In One Piece (AREA)
  • Auxiliary Devices For And Details Of Packaging Control (AREA)
  • Control And Other Processes For Unpacking Of Materials (AREA)
  • Vending Machines For Individual Products (AREA)
US08/140,385 1993-10-22 1993-10-22 Lunchbox with safety lock Expired - Fee Related US5427265A (en)

Priority Applications (17)

Application Number Priority Date Filing Date Title
US08/140,385 US5427265A (en) 1993-10-22 1993-10-22 Lunchbox with safety lock
IL110417A IL110417A (en) 1993-10-22 1994-07-22 lunch box
ZA945478A ZA945478B (en) 1993-10-22 1994-07-25 Lunchbox with safety lock
AU68734/94A AU6873494A (en) 1993-10-22 1994-07-27 Lunchbox with safety lock
CA002129914A CA2129914A1 (en) 1993-10-22 1994-08-11 Lunchbox with safety lock
DK94112783T DK0649614T3 (da) 1993-10-22 1994-08-16 Madkasse med sikkerhedslås
EP94112783A EP0649614B1 (en) 1993-10-22 1994-08-16 Lunchbox with safety lock
SI9430277T SI0649614T1 (en) 1993-10-22 1994-08-16 Lunchbox with safety lock
DE69421037T DE69421037T2 (de) 1993-10-22 1994-08-16 Brotzeitdose mit Sicherheitsverschluss
AT94112783T ATE185254T1 (de) 1993-10-22 1994-08-16 Brotzeitdose mit sicherheitsverschluss
ES94112783T ES2138640T3 (es) 1993-10-22 1994-08-16 Fiambrera con cierre de seguridad.
PH48996A PH30507A (en) 1993-10-22 1994-09-15 Lunchbox with safety lock
BR9403980A BR9403980A (pt) 1993-10-22 1994-10-04 Caixa de transporte
JP6254925A JP2528629B2 (ja) 1993-10-22 1994-10-20 安全ロックを備える弁当箱
KR1019940026934A KR960014745B1 (ko) 1993-10-22 1994-10-21 안전 로킹 장치를 갖는 도시락
HK98115846A HK1014466A1 (en) 1993-10-22 1998-12-28 Lunchbox with safety lock
GR990403025T GR3031933T3 (en) 1993-10-22 1999-11-24 Lunchbox with safety lock.

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US08/140,385 US5427265A (en) 1993-10-22 1993-10-22 Lunchbox with safety lock

Publications (1)

Publication Number Publication Date
US5427265A true US5427265A (en) 1995-06-27

Family

ID=22490995

Family Applications (1)

Application Number Title Priority Date Filing Date
US08/140,385 Expired - Fee Related US5427265A (en) 1993-10-22 1993-10-22 Lunchbox with safety lock

Country Status (17)

Country Link
US (1) US5427265A (es)
EP (1) EP0649614B1 (es)
JP (1) JP2528629B2 (es)
KR (1) KR960014745B1 (es)
AT (1) ATE185254T1 (es)
AU (1) AU6873494A (es)
BR (1) BR9403980A (es)
CA (1) CA2129914A1 (es)
DE (1) DE69421037T2 (es)
DK (1) DK0649614T3 (es)
ES (1) ES2138640T3 (es)
GR (1) GR3031933T3 (es)
HK (1) HK1014466A1 (es)
IL (1) IL110417A (es)
PH (1) PH30507A (es)
SI (1) SI0649614T1 (es)
ZA (1) ZA945478B (es)

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USD800511S1 (en) 2016-03-09 2017-10-24 Abdoolally Ebrahim Housewares Limited Salad box
USD813468S1 (en) * 2016-06-27 2018-03-20 Greg Cronkhite Pet food and water bowl with removable lid
USD817113S1 (en) * 2016-03-09 2018-05-08 Abdoolally Ebrahim Housewares Limited Lunch box
USD834388S1 (en) 2016-03-09 2018-11-27 Abdoolally Ebrahim Housewares Limited Snack pot
US10189619B1 (en) 2013-03-27 2019-01-29 Caren Crawley Lockable food container
US10271684B1 (en) 2015-07-30 2019-04-30 Columbia Insurance Company Adjustable lid for bakeware pan
US10647480B2 (en) 2014-06-16 2020-05-12 Blackhawk Molding Co., Inc. Closure with hinged lid
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US10889416B2 (en) 2017-04-24 2021-01-12 Csp Technologies, Inc. Child resistant container and method of opening same
US10961030B2 (en) 2017-04-24 2021-03-30 Csp Technologies, Inc. Slidably openable child resistant container
USD940250S1 (en) * 2019-08-23 2022-01-04 Ningbo Merryart Glow-Tech Co., Ltd. Bubble blower

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ZA945478B (en) 1995-03-03
KR950010818A (ko) 1995-05-15
DE69421037T2 (de) 2000-01-27
GR3031933T3 (en) 2000-03-31
PH30507A (en) 1997-06-13
DK0649614T3 (da) 1999-12-27
SI0649614T1 (en) 2000-02-29
JP2528629B2 (ja) 1996-08-28
AU6873494A (en) 1995-05-11
EP0649614B1 (en) 1999-10-06
ATE185254T1 (de) 1999-10-15
JPH07149359A (ja) 1995-06-13
HK1014466A1 (en) 1999-09-30
EP0649614A1 (en) 1995-04-26
IL110417A0 (en) 1994-10-21
DE69421037D1 (de) 1999-11-11
BR9403980A (pt) 1995-06-13
IL110417A (en) 1998-03-10
ES2138640T3 (es) 2000-01-16
CA2129914A1 (en) 1995-04-23
KR960014745B1 (ko) 1996-10-19

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